Search found 120 matches

by TeaRex
Tue Nov 01, 2011 4:21 pm
Forum: Feature Requests
Topic: Apple again: DOS 3.2 image should handle header-only sectors
Replies: 7
Views: 3174

Re: Apple again: DOS 3.2 image should handle header-only sec

dos32.7z
Stream Data
(240.25 KiB) Downloaded 210 times
OK here are the first 4 tracks of a real freshly formatted Apple DOS 3.2 disk. The first two should be full; the third, partially used (9 of 13 sectors); the fourth, empty. Dumped with an Epson SD-600 drive for now as my main "flippy capable" drive is still broken. I hope you can handle .7z?
by TeaRex
Sun Oct 30, 2011 9:52 pm
Forum: Feature Requests
Topic: Apple again: DOS 3.2 image should handle header-only sectors
Replies: 7
Views: 3174

Re: Apple again: DOS 3.2 image should handle header-only sec

Just screwed up my drive, so I'll post streams after I fix it. OK?
by TeaRex
Thu Oct 27, 2011 4:20 pm
Forum: Feature Requests
Topic: Apple again: DOS 3.2 image should handle header-only sectors
Replies: 7
Views: 3174

Apple again: DOS 3.2 image should handle header-only sectors

The disk formatting code of Apple DOS 3.1 / 3.2 does something fairly odd: It writes only the sector headers, with no sector bodies. Any particular sector's body is created the first time that particular sector has data written to it. This means that on such disks it is normal for unused sectors to ...
by TeaRex
Mon Oct 24, 2011 10:28 pm
Forum: Support
Topic: Can KryoFlux detect drive capabilities ?
Replies: 16
Views: 5569

Re: Can KryoFlux detect drive capabilities ?

There's a gap between tracks, so we need to degaus. At a1k.org Herzi already modified broken 3.5" drives to work as degaussers (with permanent magnets built in). The same could be done for a 5.25" mechanism I guess. Hmmm.... I guess then I'll just use my trusty Commodore 1571 drive and step it in h...
by TeaRex
Mon Oct 24, 2011 5:22 pm
Forum: Feature Requests
Topic: Come On! More Support for Commodore G64, D64, D71, ...etc
Replies: 12
Views: 5747

Re: Come On! More Support for Commodore G64, D64, D71, ...et

:mrgreen: Actually, I was thinking more along the lines of "that drive type should be reasonably easy to modify" rather than "let's order pre-modified drives".
by TeaRex
Mon Oct 24, 2011 5:20 pm
Forum: Support
Topic: Can KryoFlux detect drive capabilities ?
Replies: 16
Views: 5569

Re: Can KryoFlux detect drive capabilities ?

II would recommend using a degausser anyway for pre-formatted 5.25" media, at least when writing 48TPI disks (e.g. C64) in a 96TPI (standard HD PC) drive. This will make sure there are no leftovers from a 48TPI head between tracks (as the 96TPI head will only write about half the width). Getting a ...
by TeaRex
Sun Oct 23, 2011 11:32 pm
Forum: Support
Topic: Can KryoFlux detect drive capabilities ?
Replies: 16
Views: 5569

Re: Can KryoFlux detect drive capabilities ?

This may be a stupid question - but how would you specifically detect HD data ? the only way I can think of is by "counting" the amount of data in a track revolution or ??? As far as I remember: if the time from one flux transition to the next is regularly well below 2 microseconds, it's a HD disk....
by TeaRex
Sun Oct 23, 2011 7:15 pm
Forum: Feature Requests
Topic: Come On! More Support for Commodore G64, D64, D71, ...etc
Replies: 12
Views: 5747

Re: Come On! More Support for Commodore G64, D64, D71, ...et

Enforcing 30-years-old NDAs relating to an essentially completely obsolte technology doesn't seem to make all that much sense to me, but I guess that's the way things are.
by TeaRex
Sun Oct 23, 2011 7:08 pm
Forum: Support
Topic: Can KryoFlux detect drive capabilities ?
Replies: 16
Views: 5569

Re: Can KryoFlux detect drive capabilities ?

AFAIK there is simply no way a floppy drive could report such data to the FDC (kryoflux or any other). That's why you still have to select the drive type in the BIOS Setup even these days with PC floppy drives, when almost everything else is auto detected. The only thing that kryoflux can detect is ...
by TeaRex
Sat Oct 22, 2011 9:23 pm
Forum: Feature Requests
Topic: Come On! More Support for Commodore G64, D64, D71, ...etc
Replies: 12
Views: 5747

Re: Come On! More Support for Commodore G64, D64, D71, ...et

Note, that is exactly how (most of the) the disks were duplicated originally, a high resolution Trace machine, PC drives, modified to allow seeking to track -8 as confirmed by the company who supplied these duplicator machines at the time. Did the company also say which kind of PC drives they prefe...